<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
		div{
			float: left;
			width: 33%;
			padding-bottom: 33%;
		}
		.one {
			background-color: black;
		}
		.two {
			background-color: white;
		}
	</style>
</head>
<body>
<div class="one"></div>
<div class="two"></div>
<div class="one"></div>

<div class="two"></div>
<div class="one"></div>
<div class="two"></div>

<div class="one"></div>
<div class="two"></div>
<div class="one"></div>
</html>
